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Heart|Lab Grown|IGI

1.23ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG840623487

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG840623487

Diamond specifications and retailer prices

From $978 AUD
As of November 4, 2026
Save $1,545 AUD (61%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $2,523 AUD at With Clarity · As of November 5, 2026
View at With Clarity

About this 1.23ct lab-grown heart diamond

This 1.23ct lab-grown heart sits in the classic one-carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG840623487 or 840623487. Listed at 6 retailers as of November 4, 2026, with prices from $978 to $2,523, a $1,545 spread on the same certified stone. With Clarity lists it at $2,523. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.3°
Pavilion angle36.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840623487
Dimensions6.60 × 7.34 × 4.27 mm
L/W Ratio1.11
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.60 mm7.34 mm1.23 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840623487
Side View
Table 55.0%Crown 37.3°Girdle: MED-THKPavilion 36.9°Culet: NoneDepth 58.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $1,081 AUD|Low: $978 AUD|High: $2,523 AUD|Avg: $1,816 AUD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
With Clarity
November 5, 2026
Retailer 4$978 AUD
Retailer 1$1,081 AUD
Retailer 3$2,014 AUD
Retailer 5$2,195 AUD
Retailer 2$2,369 AUD
With Clarity$2,523 AUD

2 data points across 6 retailers

6 retailers$978 AUD to $2,523 AUD

A
Cheapest Retailer
-
$978 AUD
B+
Retailer 2
-
$1,081 AUD
View
B
Retailer 3
-
$2,014 AUD
View
B
Retailer 4
-
$2,195 AUD
View
B
Retailer 5
-
$2,369 AUD
View
Most Expensive
B
With Clarity
840623487 · Nov 5
$2,523 AUD
$1,770 USD
View
5 more retailers have this diamond
Prices start from $978 AUDSave up to $1,545 AUD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.23ct Heart
$978 AUD